AS5261芯片引脚定义引脚图及功能IC贸易商引脚图技术参数-中国IC网-芯三七

AS5261

12-Bit Automotive Angle Position Sensor

1 General Description

2 Key Features

360º contactless high resolution angular position encoding

The AS5261 is a contactless magnetic angle position sensor for

accurate angular measurement over a full turn of 360°. A sub range

can be programmed to achieve the best resolution for the

application. It is a system-on-chip, combining integrated Hall

elements, analog front end, digital signal processing and best in

class automotive protection features in a single device.

User programmable start and end point of the application region

+ linearization.

User programmable clamping levels and programming of the

transition point.

Wide temperature range: - 40ºC to + 150ºC

Small Pb-free package: MLF 16 6x6 (with dimple)

Broken GND and VDD detection

To measure the angle, only a simple two-pole magnet, rotating over

the center of the chip, is required. The magnet may be placed above

or below the IC.

The absolute angle measurement provides instant indication of the

magnet’s angular position with a resolution of 0.022° = 16384

positions per revolution. According to this resolution the adjustment

of the application specific mechanical positions are possible. The

angular output data is available over a 12 bit PWM output.

3 Benefits

Unique fully differential solution

The AS5261 operates at a supply voltage of 5V and the supply and

output pins are protected against overvoltage up to +20V. In addition

the supply pins are protected against reverse polarity up to –20V.

Best protections for automotive applications

Easy to program

Additional linearization points for output characteristic

Figure 1. Typical Arrangement of AS5261 and magnet

Ideal for applications in harsh environments due to contactless

position sensing

Robust system, tolerant to magnet misalignment, air gap

variations, temperature variations and external magnetic fields

High inherent accuracy

Stacked die redundant approach

4 Applications

The AS5261 is ideal for automotive applications like throttle and

valve position sensing, gearbox position sensor, pedal position

sensing and contactless potentiometers.

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AS5261

Datasheet - Applications

Figure 2. AS5261 Block Diagram

VDD3V3_B

VDD3V3_T

High Voltage/

Reverse Polarity

Protection

VDD_T

VDD_B

AS5261

Hall Array

Sin

DSP

CORDIC

OUT_T

OUT_B

Frontend

Amplifier

12

Cos

PWM

LS Driver

ADC

Single Pin

Interface

(UART)

Controller

OTP Register

(Programming

Parameters)

GND_B

GND_T

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AS5261

Datasheet - Contents

Contents

1 General Description ..................................................................................................................................................................

2 Key Features.............................................................................................................................................................................

3 Benefits.....................................................................................................................................................................................

4 Applications...............................................................................................................................................................................

5 Pin Assignments .......................................................................................................................................................................

5.1 Pin Descriptions....................................................................................................................................................................................

6 Absolute Maximum Ratings ......................................................................................................................................................

7 Electrical Characteristics...........................................................................................................................................................

1

4

5

6

7.1 Operating Conditions............................................................................................................................................................................

7.2 Magnetic Input Specification.................................................................................................................................................................

7.3 Electrical System Specifications...........................................................................................................................................................

7.4 Timing Characteristics..........................................................................................................................................................................

8 Detailed Description..................................................................................................................................................................

6

7

8

8.1 Operation..............................................................................................................................................................................................

8

8.1.1 VDD Voltage Monitor................................................................................................................................................................... 8

8.2 PWM Output.........................................................................................................................................................................................

8

8.2.1 Programming Parameters............................................................................................................................................................ 9

8.2.2 Application Specific Angular Range Programming...................................................................................................................... 9

8.2.3 Application Specific Programming of the Break Point ............................................................................................................... 10

8.2.4 Multiple Slope Output ................................................................................................................................................................ 10

8.2.5 Linearization of the Output......................................................................................................................................................... 12

8.2.6 Resolution of Parameters .......................................................................................................................................................... 12

8.2.7 Noise Suppressor ...................................................................................................................................................................... 14

8.2.8 Hysteresis Function ................................................................................................................................................................... 14

8.3 PWM Output Driver Parameters......................................................................................................................................................... 14

9 Application Information ........................................................................................................................................................... 15

9.1 Recommended Application Schematic............................................................................................................................................... 15

9.2 Programming the AS5261 .................................................................................................................................................................. 15

9.2.1 UART Interface for Programming .............................................................................................................................................. 16

9.2.2 Frame Organization................................................................................................................................................................... 16

9.2.3 READ......................................................................................................................................................................................... 17

9.2.4 WRITE ....................................................................................................................................................................................... 17

9.2.5 Baud Rate Setup ....................................................................................................................................................................... 18

9.3 OTP Programming Data..................................................................................................................................................................... 19

9.4 READ / WRITE Register Map............................................................................................................................................................. 23

9.5 READ Only Register Map................................................................................................................................................................... 24

9.6 Special Registers................................................................................................................................................................................ 26

9.7 Programming Procedure .................................................................................................................................................................... 27

10 Package Drawings and Markings ......................................................................................................................................... 28

11 Ordering Information ............................................................................................................................................................. 31

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AS5261

Datasheet - Pin Assignments

5 Pin Assignments

Figure 3. MLF-16 Pin Configuration (View from Top)

16

15

14

13

TP1_T

1

2

3

4

12 S_B

11 S_T

TP1_B

VDD3V3_T

VDD3V3_B

Epad

10 TP3_B

9

TP3_T

5

6

7

8

5.1 Pin Descriptions

Table 1. MLF-16 Pin Descriptions

Pin Number

Pin Name

TP1_T

Pin Type

Description

1

2

Test pin for fabrication. Connected to ground in the application.

Output of the LDO. 1µF required.

DIO/AIO

Multi purpose pin

TP1_B

3

VDD3V3_T

VDD3V3_B

GND_T

GND_B

TP2_T

AIO

4

Output of the LDO. 1µF required.

5

Ground pin. Connected to ground in the application.

Test pin for fabrication. Connected to ground in the application.

Test pin for fabrication. Left open in the application.

Supply pin

6

7

8

TP2_B

DIO/AIO

Multi purpose pin

9

TP3_T

10

TP3_B

Test pin for fabrication. Connected to OUT_T in the application.

( special case for the connection possible → 4-wire mode)

11

12

S_T

S_B

AIO

Test pin for fabrication. Connected to OUT_B in the application.

( special case for the connection possible → 4-wire mode)

13

14

15

16

OUT_T

OUT_B

VDD_T

VDD_B

PWM output pin. Open drain configuration. Programming pin.

Positive supply pin. This pin is over voltage protected.

Digital output/Digital

PWM output

Supply pin

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AS5261

Datasheet - Absolute Maximum Ratings

6 Absolute Maximum Ratings

Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of

the device at these or any other conditions beyond those indicated in Electrical Characteristics on page 6 is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

Table 2. Absolute Maximum Ratings

Symbol

Parameter

Min

Max

Units

Comments

Electrical Parameters

DC supply voltage at pin VDD

Overvoltage

No operation

Permanent

VDD

-20

20

V

VOUT

VDD3V3

I_scr

Output voltage OUT

-0.3

-100

20

5

V

DC supply voltage at pin VDD3V3

Input current (latchup immunity)

Norm: AEC-Q100-004

Norm: AEC-Q100-002

Min -67ºF; Max +257ºF

100

mA

Electrostatic Discharge

ESD

Electrostatic discharge

±2

kV

ºC

Temperature Ranges and Storage Conditions

T_strg

Storage temperature

-55

+150

The reflow peak soldering temperature (body

temperature) specified is in accordance with

IPC/JEDEC J-STD-020 “Moisture/Reflow

Sensitivity Classification for Non-Hermetic Solid

State Surface Mount Devices”. The lead finish

for Pb-free leaded packages is matte tin (100%

Sn).

T_Body

Body temperature

260

85

ºC

%

H

Humidity non-condensing

Moisture Sensitive Level

5

Represents a maximum floor life time of 168h

MSL

3

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AS5261

Datasheet - Electrical Characteristics

7 Electrical Characteristics

7.1 Operating Conditions

In this specification, all the defined tolerances for external components need to be assured over the whole operation conditions range and also

over lifetime.

Table 3. Operating Conditions

Symbol

TAMB

I_supp

Parameter

Ambient temperature

Supply current

Conditions

-40ºF…+302ºF

Min

Typ

Max

+150

10

Units

ºC

-40

Only for one die. Must be multiplied by 2

mA

V

VDD

Supply voltage at pin VDD

4.5

5.0

5.5

7.2 Magnetic Input Specification

TAMB = -40 to +150ºC, VDD = 4.5 to 5.5V (5V operation), unless otherwise noted.

Two-pole cylindrical diametrically magnetized source:

Table 4. Magnetic Input Specification

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Required vertical component of the

magnetic field strength on the die’s surface,

measured along a concentric circle with a

radius of 1.25 mm

B_pk

Magnetic input field amplitude

30

70

mT

Required vertical component of the

magnetic field strength on the die’s surface,

measured along a concentric circle with a

radius of 1.25 mm. Increased sensor output

noise.

Magnetic input field amplitude

(extended) default setting

B_pkext

10

90

mT

B_off

Magnetic offset

Constant magnetic stray field

± 5

mT

Offset between defined device center and

magnet axis. Dependent on the selected

magnet. Including Eccentricity.

D_isp

Displacement radius

1

mm

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AS5261

Datasheet - Electrical Characteristics

7.3 Electrical System Specifications

TAMB = -40 to +150ºC, VDD = 4.5 - 5.5V (5V operation), Magnetic Input Specification, unless otherwise noted.

Table 5. Electrical System Specifications

Symbol

Parameter

Conditions

Min

Typ

Max

Units

º

Range > 90

RES

Resolution PWM Output

12

bit

Best aligned reference magnet at 25ºC

over full turn 360º.

INL_opt

Integral non-linearity (optimum)

0.5

0.9

deg

Best aligned reference magnet over

temperature -40 -150º over full turn 360º.

INL_temp

Best aligned reference magnet over

temperature -40 -150º over full turn 360º

and displacement

INL

Integral non-linearity

1.4

deg

At 14 bit angular information, 360º mode.

Internal Filter disabled.

ON_F0

ON_F1

ON_F2

ON_F3

t_PwrUp

±5

±3

LSB

ms

At 14 bit angular information, 360º mode.

Filter setting 1.

Output Noise

At 14 bit angular information, 360º mode.

Filter setting 2.

±2

At 14 bit angular information, 360º mode.

Filter setting 3. Jitter free.

±0.5

10

Power up time 5V operation. Default Power

up.

Power-up time 0-5V

System propagation delay

absolute output: delay of ADC,

DSP and absolute interface

t_delay

300

µs

7.4 Timing Characteristics

Table 6. Timing Conditions

Symbol

Parameter

WachDog error detection time

Conditions

Min

Typ

Max

Units

T_DETWD

12

ms

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AS5261

Datasheet - Detailed Description

8 Detailed Description

The AS5261 is manufactured in a CMOS process and uses a spinning current Hall technology for sensing the magnetic field distribution across

the surface of the chip. This IC consists of two galvanic isolated dies. All following in and register names refers to one die.

The integrated Hall elements are placed around the center of the device and deliver a voltage representation of the magnetic field at the surface

of the IC.

Through Sigma-Delta Analog / Digital Conversion and Digital Signal-Processing (DSP) algorithms, the AS5261 provides accurate high-resolution

absolute angular position information. For this purpose a Coordinate Rotation Digital Computer (CORDIC) calculates the angle and the

magnitude of the Hall array signals.

The DSP is also used to provide digital information at the outputs that indicate movements of the used magnet towards or away from the device’s

surface.

A small low cost diametrically magnetized (two-pole) standard magnet provides the angular position information.

The AS5261 senses the orientation of the magnetic field and calculates a 14-bit binary code. This code is mapped to a programmable output

characteristic in a PWM duty cycle format. This signal is available at the pin (OUT).

The application angular region can be programmed in a user friendly way. The start angle position T1 and the end point T2 can be set and

programmed according the mechanical range of the application with a resolution of 14 bits. In addition the T1Y and T2Y parameter can be set

and programmed according the application. The transition point 0 to 360 degree can be shifted using the break point parameter BP. The voltage

for clamping level low CLL and clamping level high CLH can be programmed with a resolution of 9 bits. Both levels are individually adjustable.

Two additional linearization points can be used to improve the system linearity. These points C1 and C2 are programmable.

The output parameters can be programmed in an OTP register. No additional voltage is required to program the AS5261. The setting may be

overwritten at any time and will be reset to default when power is cycled. To make the setting permanent, the OTP register must be programmed

by using a lock bit the content could be frozen for ever.

The AS5261 is tolerant to magnet misalignment and unwanted external magnetic fields due to differential measurement technique and Hall

sensor conditioning circuitry.

8.1 Operation

8.1.1 VDD Voltage Monitor

VDD Over Voltage Management. If the voltage applied to the VDD pin exceeds the over-voltage upper threshold for longer than the

detection time the output is turned off. When the over voltage event has passed and the voltage applied to the VDD pin falls below the over-

voltage lower threshold for longer than the recovery time the device enters the normal mode and the output is enabled.

VDD Under Voltage Management. When the voltage applied to the VDD pin falls below the under-voltage lower threshold for longer than

the detection time the output is turned off. When the voltage applied to the VDD pin exceeds the under-voltage upper threshold for longer than

the detection time the device enters the normal mode and the output is enabled.

8.2 PWM Output

By default (after programmed CUST_LOCK OTP bit) the PWM output mode is selected. The pin OUT provides a modulated signal that is

proportional to the angle of the rotating magnet. Due to an intelligent approach a permanent short circuit will not damage the device. This is also

feasible in a high voltage condition up to 20 V and at the highest specified ambient temperature.

After the digital signal processing (DSP) a PWM engine provides the output signal.

The DSP maps the application range to the output characteristic. An inversion of the slope is also programmable to allow inversion of the rotation

direction.

An on-chip diagnostic feature handles the error state at the output. Depending on the failure the output is in HiZ condition or indicates a PWM

signal within the failure bands of 4 – 96 % duty cycle. (see Table 8)

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AS5261

Datasheet - Detailed Description

8.2.1 Programming Parameters

The PWM output characteristic is programmable by OTP. Depending on the application, the output can be adjusted. The user can program the

following application specific parameters:

Mechanical angle start point

Mechanical angle end point

% duty cycle level at the T1 position

% duty cycle level at the T2 position

Clamping Level Low

T1

T2

T1Y

T2Y

CLL

CLH

BP

Clamping Level High

Break point (transition point 0 to 360º)

Calibration Point 1

C1

Calibration Point 2

C2

Trim value for C1

C1Y

C2Y

Trim value for C2

These parameters are input parameters. Using the available programming software and programmer these parameters are converted and finally

written into the AS5261 128 bit OTP memory.

8.2.2 Application Specific Angular Range Programming

The application range can be selected by programming T1 with a related T1Y and T2 with a related T2Y into the AS5261. The clamping levels

CLL and CLH can be programmed independent from the T1 and T2 position and both levels can be separately adjusted.

Figure 4. Programming of an Individual Application Range

Figure 4 shows a simple example of the selection of the range. The mechanical starting point T1 and the mechanical end point T2 are defining

the mechanical range. A sub range of the internal Cordic output range is used and mapped to the needed output characteristic. The PWM output

signal has 12 bit, hence the level T1Y and T2Y can be adjusted with this resolution. As a result of this level and the calculated slope the clamping

region low is defined. The break point BP defines the transition between CLL and CLH. In this example the BP is set to 0º. The BP is also the

end point of the clamping level high CLH. This range is defined by the level CLH and the calculated slope. Both clamping levels can be set

independently form each other. The minimum application range is 9.8º.

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AS5261

Datasheet - Detailed Description

8.2.3 Application Specific Programming of the Break Point

The break point BP can be programmed as well with 14 bits. This is important when the default transition point is inside the application range. In

such a case the default transition point must be shifted out of the application range. The parameter BP defines the new position.

Figure 5. Individual Programming of the Break Point BP

8.2.4 Multiple Slope Output

The AS5261 can be programmed to multiple slopes. Where one programmed reference slope characteristic is copied to multiple slopes. Two,

three and four slopes are selectable by the user OTP bits QUADEN (1:0). In addition to the steepness of the slope the clamping levels can be

programmed as well.

Figure 6. Two Slope Mode

100 % DC

0

360

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AS5261

Datasheet - Detailed Description

Figure 7. Four Slope Mode

100 % DC

0

360

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AS5261

Datasheet - Detailed Description

8.2.5 Linearization of the Output

To improve the system linearity an additional 2 point linearization function is implemented in the AS5261.

Figure 8. Linearization of the Output Characteristic

100%DC

CLH

T2Y

C2Y

C1Y

T1Y

CLL

0

T1

C1

C2

T2

8.2.6 Resolution of Parameters

The programming parameters have a wide resolution of up to 14 bits.

Table 7. Resolution of the Programming Parameters

Symbol

T1

Parameter

Mechanical angle start point

Mechanical angle stop point

Mechanical start voltage level

Mechanical stop voltage level

Clamping level low

Resolution

14 bits

12 bits

9 bits

Note

T2

T1Y

T2Y

CLL

CLH

BP

Clamping level high

Break point

9 bits

14 bits

4 bits

C1

Calibration Point 1

C2

Calibration Point 2

4 bits

C1Y

C2Y

Trim value C1

3 bits

Trim value C2

3 bits

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AS5261

Datasheet - Detailed Description

Figure 9. Overview Output Range

100

96

Failure Band High

Clamping Region High

CLH

Application Region

CLL

Clamping Region Low

Failure Band Low

4

0

Figure 9 gives an overview about the different ranges. The failure bands are used to indicate a wrong operation of the AS5261. This can be

caused due to a broken supply line. By using the specified load resistors the output level will remain in these bands during a fail. It is

recommended to set the clamping level CLL above the lower failure band and the clamping level CLH below the higher failure band.

C_LOAD≤ 33 nF, RPU= 1k…10kΩ

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AS5261

Datasheet - Detailed Description

Table 8. Different Failure Cases of AS5261

Type

Failure Mode

Symbol

Failure Band

Note

Out of magnetic range

(too less or too high magnetic input)

Programmable by OTP bit DIAG_HIGH

MAGRng

High/Low

Cordic overflow

Programmable by OTP bit DIAG_HIGH

COF

OCF

WDF

OF

High/Low

Internal alarms (failures)

Offset compensation finished

Watchdog fail

Oscillator fail

Overvoltage condition

Broken VDD

OV

Dependant on the load resistor

Pull up → failure band high

BVDD

BVSS

SCO

High

Application related

failures

Broken VSS

Short circuit output

Switch off → short circuit dependent

For efficient use of diagnostics, it is recommended to program to clamping levels CLL and CLH.

8.2.7 Noise Suppressor

The noise suppressor is inserted on two levels of the DSP chain. The first stage, on the output of the Cordic block, is capable to reduce the noise

level up to 1 LSB peak to peak. The second stage, on the output of the straight-line tracer, reduces the impact of the post processing. In fact

depending on the programmed operating angular sector the gain module amplifies also the noise level up to 8 LSB peak to peak and the second

stage of the noise suppressor reduces it again to 1 LSB peak to peak.

Four possible configurations of the noise suppressor can be selected via the OTP bits FILTERCFG<1:0>.

8.2.8 Hysteresis Function

AS5261 device includes a hysteresis function to avoid sudden jumps from CLH to CLL and vice versa caused by noise in the full turn

configuration.

The hysteresis amplitude can be selected via the OTP bits HYSTSEL<1:0>.

8.3 PWM Output Driver Parameters

The output stage is configured in a open drain output.

The PWM duty cycle represents the angular output data. All programming features are available for the PWM mode as well. The PWM period is

programmable in four steps and can be programmed by PWMF<2:0>.

C_LOAD≤ 33 nF, R_PU= 1k…10kΩ

Table 9. PWM Parameters Output Driver

Symbol

PWMF1

PWMF2

PWMF3

PWMF4

PWMF5

PWMF6

PWMF7

PWMF8

PWMDC

PWMVOL

Parameter

PWM frequency 7

PWM frequency 6

PWM frequency 5

PWM frequency 4

PWM frequency 3

PWM frequency 2

PWM frequency 1

PWM frequency 0

PWM duty cycle range

Output voltage low

Conditions

Min

109.86

179.78

219.73

329.59

494.38

659.18

988.77

1977.54

4

Typ

122

200

244

366

549

732

Max

Units

Hz

%

PWMF<2:0>=111

PWMF<2:0>=110

PWMF<2:0>=101

PWMF<2:0>=100

PWMF<2:0>=011

PWMF<2:0>=010

PWMF<2:0>=001

PWMF<2:0>=000

info parameter

134.28

219.73

268.55

402.83

604.25

805.66

1100 1208.50

2197

2416.2

96

IOUT=5mA

0

0.4

V

Between 75% and 25%

RPUOUT=4KΩ; CLOUT=1nF

VDD=5V

PWMSRF

PWM slew rate (falling edge)

1

2

4

V / µs

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AS5261

Datasheet - Application Information

9 Application Information

9.1 Recommended Application Schematic

Figure 10 shows the recommended schematic in the application. All components marked with (*) are optional and can be used to further

increase the EMC.

Figure 10. AS5261 6-Wire Connection with Pull-Up Resistors

Sensor PCB

Electric Control Unit

R_{LPU_T}

VDD1

VDD2

OUT2

R_{LPU_B}

*

R_{1_x}

*

R_{2_x}

OUT1

16

15

14

13

TP1_T

TP1_B

*

C_{1_x}

C_{4_x}

1

2

3

4

12

11

10

9

S_B

S_T

AS5261

VDD3V3_T

C_{3_x}

C_{L_T}

C_{L_B}

TP3_B

VDD3V3_B

C_{2_x}

TP3_T

5

6

7

8

GND1

GND2

Table 10. External Components

Symbol

Parameter

VDD buffer capacitor

Min

0.8

0

Typ

1

Max

1.2

4.7

Unit

µF

nF

Note

C₁

Low ESR 0.3 Ω

C₂

C₃

VDD3V3 regulator capacitor

1

OUT load capacitor (sensor PCB)

Do not increase due to

programming over output.

*

VDD capacitor (optional)

4.7

10

nF

C₄

R₁

*

VDD serial resistor (optional)

OUT load capacitor (ECU)

OUT serial resistor (optional)

OUT pull-up resistance

Ω

nF

Ω

C_L

0

4

33

10

*

50

R₂

R_LPU

kΩ

9.2 Programming the AS5261

The AS5261 programming is a one-time-programming (OTP) method, based on polysilicon fuses. The advantage of this method is that no

additional programming voltage is needed. The internal LDO provides the current for programming.

The OTP consists of 128 bits; several bits are available for user programming. In addition factory settings are stored in the OTP memory. Both

regions are independently lockable by build in lock bits.

A single OTP cell can be programmed only once. Per default, the cell is “0”; a programmed cell will contain a “1”. While it is not possible to reset

a programmed bit from “1” to “0”, multiple OTP writes are possible, as long as only unprogrammed “0”-bits are programmed to “1”.

Independent of the OTP programming, it is possible to overwrite the OTP register temporarily with an OTP write command. This is possible only

if the user lock bit is not programmed.

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AS5261

Datasheet - Application Information

Due to the programming over the output pin the device will initially start in the communication mode. In this mode the digital angle value can be

read with a specific protocol format. It is a bidirectional communication possible. Parameters can be written into the device. A programming of the

device is triggered by a specific command. With another command (pass2func) the device can be switched into operation mode. In case of a

programmed user lock bit the AS5261 automatically starts up in the functional operation mode. No communication of the specific protocol is

possible after this.

A standard half duplex UART protocol is used to exchange data with the device in the communication mode.

9.2.1 UART Interface for Programming

The AS5261 uses a standard UART interface with a byte for address and two bytes for the data content. The read or write mode is selected in

the first byte. An even parity for every byte. The timing (baudrate) is selected by the AS5261 over an initial command from the master. The baud

rate register can be read and overwritten. The keep synchronization it AS5261 synchronizes art every Start bit. This happens during a standard

write access 3 times.

A time out function detects not complete commands and resets the AS5261 UART after the timeout period.

9.2.2 Frame Organization

Each frame is composed by 24 bits. The first byte (Address or Command) of the frame specifies the read/write operation with the register

address or is used for a command. 16 data bits contains the communication data. There will be no operation in case of the usage of a not

specified CMD. The UART programming interface block of the AS5261 can operate in slave communication or master communication mode. In

the slave communication mode the AS5261 receives the data. The programming tool is the driver of the single communication line. In case of the

master comunication mode the AS5261 transmits data in the frame format. The single communication line can be pulled down by the AS5261.

Table 11. OTP Commands and Communication

Possible Interface

Commands

AS5X63 Communication

Mode

Address / Command

Description

0x00-0x0F (OTP)

0x10-0x1F (SFR)

0x20-0xFF (Special Mode)

Write related to the address the user data

WRITE

READ

SLAVE

0x00-0x0F (OTP)

0x10-0x1F (SFR)

0x20-0xFF (Special Mode)

Read related to the address the user data

Command for permanent programming

SLAVE and MASTER

FUSE

0x22+ key

SLAVE

Change operation mode from communication to

operation

PASS2FUNC

0x23+ key

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Revision 1.1

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AS5261

Datasheet - Application Information

9.2.3 READ

Figure 11 shows the format of the frame:

Figure 11. Organization of the READ Command

Low Byte

High Byte

Reg. Address

IDLE

S

P

S

P

S

P

IDLE

AS5261 in Receiving

Mode

AS5261 in transmitting mode (Read

Access)

The R/Wn bit in the first byte selects the mode. Between the data packets is always a break state. The break state has the same length as the

other data bits.

An even parity bit is used to guarantee a correct data transmission. The parity bit is generated by the 8 bits.

9.2.4 WRITE

Figure 12 shows the format of the frame:

Figure 12. Organization of the READ Command

Low Byte

High Byte

Reg. Address

IDLE

S

P

S

P

S

P

IDLE

AS5261 in Receiving

Mode

AS5261 in Receiving Mode (Write Access)

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Revision 1.1

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AS5261

Datasheet - Application Information

9.2.5 Baud Rate Setup

Due to the internal RC oscillator the AS5261 needs to synchronize to the master. This happens after startup with the first baud rate command.

This register address is reserved after the first successful setup for a possible manual setting of the baud rate.

Figure 13. Baud Rate Setup

Baud Command

IDLE

S

1

0

1

0

1

0

1

0

P

IDLE

0x55 » „U“ will be send from

Master to Setup Baudrate of

AS5261

Low Byte

High Byte

Baud Command

IDLE

S

1

0

1

0

1

0

1

0

P

S

P

S

P

IDLE

Read Write Baud Rate of

AS5261

AS5261 in Receiving

Mode

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Revision 1.1

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AS5261

Datasheet - Application Information

9.3 OTP Programming Data

Table 12. OTP Memory Map

Data Byte

Bit Number

Symbol

Default

Description

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

0

DATA15 (0x0F)

Factory Settings

AMS (reserved)

DATA14 (0x0E)

CUSTID<0>

CUSTID<1>

CUSTID<2>

CUSTID<3>

CUSTID<4>

CUSTID<5>

CUSTID<6>

X2LIN<0>

X2LIN<1>

X2LIN<2>

X2LIN<3>

X1LIN<0>

X1LIN<1>

X1LIN<2>

X1LIN<3>

Y1LIN<0>

DATA13 (0x0D)

Customer Identifier

Second linearization point (X-axis)

DATA12 (0x0C)

DATA11 (0x0B)

First linearization point (X-axis)

First linearization point (Y-axis)

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Revision 1.1

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AS5261

Datasheet - Application Information

Table 12. OTP Memory Map

Data Byte

Bit Number

Symbol

Y1LIN<1>

Y1LIN<2>

Y2LIN<0>

Y2LIN<1>

Y2LIN<2>

CLH<0>

Default

Description

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

First linearization point (Y-axis)

Second linearization point (Y-axis)

CLH<1>

CLH<2>

CLH<3>

CLH<4>

Clamping Level High

DATA10 (0x0A)

DATA9 (0x09)

DATA8 (0x08)

DATA7 (0x07)

CLH<5>

CLH<6>

CLH<7>

CLH<8>

CLL<0>

CLL<1>

CLL<2>

CLL<3>

CLL<4>

Clamping Level Low

CLL<5>

CLL<6>

CLL<7>

CLL<8>

OFFSET<0>

OFFSET<1>

OFFSET<2>

OFFSET<3>

OFFSET<4>

OFFSET<5>

OFFSET<6>

OFFSET<7>

OFFSET<8>

OFFSET<9>

OFFSET<10>

OFFSET<11>

OFFSET<12>

OFFSET<13>

OFFSET<14>

Offset

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Revision 1.1

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AS5261

Datasheet - Application Information

Table 12. OTP Memory Map

Data Byte

Bit Number

Symbol

OFFSET<15>

OFFSET<16>

OFFSET<17>

OFFSET<18>

OFFSET<19>

GAIN<0>

GAIN<1>

GAIN<2>

GAIN<3>

GAIN<4>

GAIN<5>

GAIN<6>

GAIN<7>

GAIN<8>

GAIN<9>

GAIN<10>

GAIN<11>

GAIN<12>

GAIN<13>

GAIN<14>

GAIN<15>

GAIN<16>

BP<0>

Default

Description

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

0

Offset

DATA6 (0x06)

DATA5 (0x05)

DATA4 (0x04)

DATA3 (0x003)

Scale Factor

BP<1>

BP<2>

BP<3>

BP<4>

BP<5>

BP<6>

Break Point

BP<7>

BP<8>

BP<9>

BP<10>

BP<11>

BP<12>

BP<13>

DATA2 (0x02)

Sector selection

4

5

ANGLERNG

DIAG_HIGH

0

0=Angular Sector≥22.5 degrees;

1=Angular Sector<22.5 degrees

Failure Band Selection

0=Failure Band Low 1=Failure Band

High

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Revision 1.1

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AS5261

Datasheet - Application Information

Table 12. OTP Memory Map

Data Byte

Bit Number

Symbol

Default

Description

6

7

QUADEN<0>

0

Quadrant Mode Enable

00=1quadrant;01=2quadrants;

10=3 quadrants;11=4 quadrants

DATA2 (0x02)

QUADEN<1>

AIRGAPSEL

0

Magnetic input range extension

0:extended range;1=normal range

0

1

2

3

4

HYSTSEL<0>

HYSTSEL<1>

FILTERCFG<0>

FILTERCFG<1>

0

Hysteresis selection

00=no hysteresis; 01: 56LSB;

10=91LSB; 11=137LSB

Filter Configuration

00=no filter; 01= fast;

10=moderate; 11=slow

DATA1 (0x01)

5

6

7

0

1

2

3

4

5

6

7

Not used

0

Not used

RED_ADD<0>

RED_ADD<1>

RED_ADD<2>

RED_ADD<3>

RED_BIT<0>

RED_BIT<1>

RED_BIT<2>

CUST_LOCK

Redundancy Address

Identify the address of the byte

containing the bit to be changed

DATA0 (0x00)

Redundancy Bit

Identify the position of the bit to be

changed in the byte at the address

RED_ADD<3:0>

Lock bit for Customer Area

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Revision 1.1

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AS5261

Datasheet - Application Information

9.4 READ / WRITE Register Map

Table 13. Read / Write Registers

Data Byte

Bit Number

Symbol

BAUDREG<0>

BAUDREG<1>

BAUDREG<2>

BAUDREG<3>

BAUDREG<4>

BAUDREG<5>

BAUDREG<6>

BAUDREG<7>

BAUDREG<8>

Not used

Default

Description

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

0

DATA0 (0x20)

UART Baud Rate Register

Not used

DATA1 (0x21)

A read command returns all data bits

at 0

Not used

DATA2 (0x22)

Not used

R1K10K<0>

R1K10K<1>

Selection of the reference resistance

used for OTP download

Resetn of the Digital Signal Processing

circuit

7

DSPRN

0

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Revision 1.1

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AS5261

Datasheet - Application Information

9.5 READ Only Register Map

Table 14. Read Only Registers

Data Byte

Bit Number

Symbol

Not used

Default

Description

0

1

2

3

0

A read command returns 0

Offset compensation finished

AGC loop compensation finished

Overflow of the Cordic

OFFSETFINISHED

AGCFINISHED

CORDICOVF

AGC loop saturation because of B field

too strong

4

5

AGCALARML

AGCALARMH

0

DATA0 (0x28)

AGC loop saturation because of B field

too weak

0=1K resistance selected for OTP

download;

6

OTP_RES

0

1=10K resistance selected for OTP

download

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

PARITY_ERR

CORDICOUT<0>

CORDICOUT<1>

CORDICOUT<2>

CORDICOUT<3>

CORDICOUT<4>

CORDICOUT<5>

CORDICOUT<6>

CORDICOUT<7>

CORDICOUT<8>

CORDICOUT<9>

CORDICOUT<10>

CORDICOUT<11>

CORDICOUT<12>

CORDICOUT<13>

Not used

0

UART parity error flag

DATA1 (0x29)

DATA2 (0x2A)

DATA3 (0x2B)

Cordic Output

A read command returns all data bits

at 0

Not used

DSPOUT<0>

DSPOUT<1>

DSPOUT<2>

DSPOUT<3>

DSP Output

DSPOUT<4>

DSPOUT<5>

DSPOUT<6>

DSPOUT<7>

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Revision 1.1

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AS5261

Datasheet - Application Information

Table 14. Read Only Registers

Data Byte

Bit Number

Symbol

DSPOUT<8>

DSPOUT<9>

DSPOUT<10>

DSPOUT<11>

Not used

Default

Description

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

DSP Output

DATA4 (0x2C)

Not used

A read command returns all data bits

at 0

Not used

AGCVALUE<0>

AGCVALUE<1>

AGCVALUE<2>

AGCVALUE<3>

AGCVALUE<4>

AGCVALUE<5>

AGCVALUE<6>

AGCVALUE<7>

MAG<0>

DATA5 (0x2D)

DATA6 (0x2E)

DATA7 (0x2F)

AGC Value

MAG<1>

MAG<2>

MAG<3>

Magnitude of magnetic field

MAG<4>

MAG<5>

MAG<6>

MAG<7>

Not used

A read command returns all data bits

at 0

Not used

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Revision 1.1

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AS5261

Datasheet - Application Information

9.6 Special Registers

Table 15. Special Registers

Data Byte

Bit Number

Symbol

Default

Description

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

0

1

2

3

4

5

6

7

AS5261KEY<0>

AS5261KEY<1>

AS5261KEY<2>

AS5261KEY<3>

AS5261KEY<4>

AS5261KEY<5>

AS5261KEY<6>

AS5261KEY<7>

AS5261KEY<8>

AS5261KEY<9>

AS5261KEY<10>

AS5261KEY<11>

AS5261KEY<12>

AS5261KEY<13>

AS5261KEY<14>

AS5261KEY<15>

AS5261KEY<0>

AS5261KEY<1>

AS5261KEY<2>

AS5261KEY<3>

AS5261KEY<4>

AS5261KEY<5>

AS5261KEY<6>

AS5261KEY<7>

AS5261KEY<8>

AS5261KEY<9>

AS5261KEY<10>

AS5261KEY<11>

AS5261KEY<12>

AS5261KEY<13>

AS5261KEY<14>

AS5261KEY<15>

0

DATA0 (0x41)

AS5261 KEY<15:0>=0101 0001 0110

0010

A write command with data different

from AS5261 KEY is not executed

A read command returns all data bits

at 0

DATA1 (0x42)

DATA0 (0x60)

DATA1 (0x61)

AS5261 KEY<15:0>=0101 0001 0110

0010

A write command with data different

from AS5261 KEY is not executed

A read command returns all data bits

at 0

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Revision 1.1

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AS5261

Datasheet - Application Information

9.7 Programming Procedure

Pull-up on out pin

VDD=5V

Wait 10ms (after the startup time device enters communication mode)

Write command: Trimming bits are written in the OTP RAM

Read command: All the trimming bits are read back to check the correctness of the writing procedure.

Write AS5261KEY in the Fuse register: The OTP RAM content is permanently transferred into the Poly Fuse cells.

Wait 10 ms (fuse time)

Write command, R1K_10K<1:0>=(11)b: Poly Fuse cells are downloaded into the RAM memory using a 10K resistance as reference.

Wait 5 ms (download time)

Read R1K_10K register, the expected value is 00b

Write command, R1K_10K<1:0>=(11)b

Read R1K_10K register, the expected value is (11)b. NB: Step11 and Step12 have to be consecutive.

Read command: all the fused bits downloaded with 10K resistance are read back.

Write command, R1K_10K=<1:0>=(10)b: Poly Fuse cells are downloaded into the RAM memory using a 1K resistance as reference.

Wait 5 ms (download time)

Read R1K_10K register, the expected value is (00)b

Write command register, R1K_10K<1:0>=(10)b

Read R1K_10K register, the expected value is (10)b NB: Step18 and Step19 have to be consecutive.

Read command: All the fused bits downloaded with 1K resistance are read back.

Check that read commands at Steps 5, 13 and 19 are matching

Write AS5261 KEY in the Pass2Func register: Device enters normal mode.

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Revision 1.1

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AS5261

Datasheet - Package Drawings and Markings

10 Package Drawings and Markings

The device is available in a MLF-16 package.

Figure 14. Package Drawings and Dimensions

Symbol

A

Min

0.80

0

Nom

0.90

Max

1.00

0.05

1.00

A1

A2

A3

L

0.02

-

0.65

0.20 REF

0.60

0.50

0.05

0º

0.70

0.25

0.15

14º

L1

L2

Θ

0.15

0.10

-

b

0.35

0.20

0.40

0.45

0.30

b1

D

0.25

6.00 BSC

1.00 BSC

5.75 BSC

4.20

E

e

D1

E1

D2

E2

aaa

bbb

ccc

ddd

eee

fff

4.10

4.30

4.10

4.20

4.30

-

0.15

-

0.10

Notes:

0.05

1. Dimensions and tolerancing confirm to ASME Y14.5M-1994.

2. All dimensions are in miilimeters. Angles are in degrees.

3. Bilaretal coplanarity zone applies to the exposed pad as well as the terminal.

4. Radius on the terminal is optional.

0.08

0.10

N

16

5. N is the total number of terminals.

Marking: YYWWIZZ.

YY

WW

V

ZZ

Year

Week

Assembly plant identifier

Assembly traceability code

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Revision 1.1

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AS5261

Datasheet - Package Drawings and Markings

Figure 15. Vertical Cross Section of MLF-16

Notes:

1. All dimensions in mm.

2. Die thickness 0.150mm nom.

3. Adhesive thickness 0.011mm.

4. Spacer thickness 0.203mm typ.

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Revision 1.1

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AS5261

Datasheet - Revision History

Revision History

Revision

Date

Owner

Description

Initial revision

Updated Figure 3, Table 1, Detailed Description and Added Section 9.1

1.0

1.1

30 Oct, 2012

31 Oct, 2012

mub

Note: Typos may not be explicitly mentioned under revision history.

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Revision 1.1

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AS5261

Datasheet - Ordering Information

11 Ordering Information

The device is available as the standard products shown in Table 16.

Table 16. Ordering Information

Ordering Code

Description

Delivery Form

Package

12-bit programmable redundant angle position sensor with PWM

outputs

AS5261-HMFP

Tape and Reel

MLF 16 6x6

Note: All products are RoHS compliant and ams green.

Buy our products or get free samples online at www.ams.com/ICdirect

Technical Support is available at www.ams.com/Technical-Support

For further information and requests, email us at sales@ams.com

(or) find your local distributor at www.ams.com/distributor

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Revision 1.1

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AS5261

Datasheet - Copyrights

Copyrights

reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the

copyright owner.

All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams AG makes no

warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described

devices from patent infringement. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior

to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in normal

commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability

applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing

by ams AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard

production flow, such as test flow or test location.

The information furnished here by ams AG is believed to be correct and accurate. However, ams AG shall not be liable to recipient or any third

party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or

indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the

technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other

services.

Contact Information

Headquarters

ams AG

Tobelbaderstrasse 30

A-8141 Unterpremstaetten, Austria

Tel : +43 (0) 3136 500 0

Fax : +43 (0) 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:

http://www.ams.com/contact

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Revision 1.1

32 - 32

型号:	AS5261RF
是否无铅：	不含铅
是否Rohs认证：	符合
生命周期：	Obsolete
包装说明：	,
Reach Compliance Code：	compliant
ECCN代码：	EAR99
HTS代码：	8533.21.00.80
风险等级：	5.64
其他特性：	SEMI-PRECISION
JESD-609代码：	e3
制造商序列号：	AS
安装特点：	THROUGH HOLE MOUNT
端子数量：	2
最高工作温度：	275 °C
封装形状：	TUBULAR PACKAGE
包装方法：	TR
额定功率耗散 (P)：	7 W
额定温度：	25 °C
电阻：	261 Ω
电阻器类型：	FIXED RESISTOR
表面贴装：	NO
技术：	WIRE WOUND
温度系数：	20 ppm/ °C
端子面层：	Matte Tin (Sn) - with Nickel (Ni) barrier
端子形状：	WIRE
容差：	1%
Base Number Matches：	1

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